code: def testGetErrorStrings(self):
      for ierr in self.errorclasses:
          errstr = MPI.Get_error_string(ierr)
          self.assertGreater(len(errstr), 0)
  
file_path: mpi4py/test/test_errorcode.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 2 for calling the TestErrorCode obj's underlying member method code with example usage: obj.testGetErrorStrings() without return types